Justification:
The introduction of the carnivorous snail Euglandina rosea onto all the Society Islands has impacted on the on the distribution. No live individuals were found in intensive surveys on Bora Bora in 1991, or on Raiatea in 2000. A small population was found on Moorea in 1996 and a few small populations on Tahiti during the surveys of 2003-2005. A few individuals were found on Raiatea in 2006.